chore(ci): Add release artifact CI

[paleolimbot]

This PR adds a release tarball and docs tarball build. We need at least the release tarball build because we'll need to release something! These workflows are adapted from arrow-nanoarrow.

This also builds documentation and uploads it to asf-site. We can workshop exactly how this works...the important part for now is to upload anything at all so we can look at our docs before we release.

...also fixes an issue with the nightly uploader where (1) the secret name was wrong and (2) we weren't using a unique version so the nightly wheels would have been rejected if uploaded twice.

[Copilot]

Pull Request Overview

This PR adds CI workflows for building release artifacts including source tarballs and documentation. The focus is on preparing infrastructure for releasing SedonaDB by creating packaging workflows adapted from arrow-nanoarrow, and includes fixes to the existing nightly wheel upload process.

Key changes:

• Adds new packaging.yml workflow for building source archives and documentation
• Creates scripts for building source tarballs and documentation
• Fixes nightly wheel upload secret name and adds version stamping
• Updates project metadata and documentation configuration

Reviewed Changes

Copilot reviewed 12 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
.github/workflows/packaging.yml	New workflow for building release artifacts, documentation, and managing asf-site updates
ci/scripts/build-source.sh	Script for creating source tarball from git archive
ci/scripts/build-docs.sh	Script for building documentation with mkdocs
ci/scripts/set_dev_version.py	Python script for generating development versions based on git history
.github/workflows/python-wheels.yml	Fixes secret name and adds dev version setting for nightly builds
Cargo.toml	Updates workspace metadata with correct version and repository information
python/sedonadb/context.py	Adds type annotations to function parameters
docs/requirements.txt	Simplifies dependencies by removing unused packages
mkdocs.yml	Excludes README.md from documentation build
docs/README.md	Improves formatting of installation instructions

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